Patents by Inventor Ki Hyuk Yoon

Ki Hyuk Yoon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7016112
    Abstract: A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The polarizer holder may be in a lattice structure holding a plurality of quartz substrate parts. A polarizer system employing the large scale polarizer comprises a lens making an incident light to a parallel light, the large scale polarizer, and a moving control part coupled to and moving the large scale polarizer.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: March 21, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae Beom Choi, Byung Duck Song, Ki Hyuk Yoon
  • Patent number: 7016113
    Abstract: A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The polarizer holder may be in a lattice structure holding a plurality of quartz substrate parts. A polarizer system employing the large scale polarizer comprises a lens making an incident light to a parallel light, the large scale polarizer, and a moving control part coupled to and moving the large scale polarizer.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: March 21, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae Beom Choi, Byung Duck Song, Ki Hyuk Yoon
  • Patent number: 6879363
    Abstract: A method is disclosed for controlling a pretilt angle direction for a liquid crystal cell comprising the steps of first setting the magnitude of pretilt angle and a plurality of pretilt angle directions in an alignment layer. This first step is achieved by irradiating linearly the alignment layer with polarized or unpolarized UV light. One of the plurality of pretilt angle directions is then selected by exposing the alignment layer to UV light a second time.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: April 12, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yuriy Reznikov, Oleg Yaroshchuk, Joung Won Woo, Yoo Jin Chol, Ki Hyuk Yoon, Mi Sook Nam, Jong Hyun Kim, Soon Bum Kwon
  • Publication number: 20040257512
    Abstract: The present invention discloses an IPS-LCD device. The IPS-LCD device according to the present invention implements a multi-domain for a liquid crystal layer. The liquid crystal molecules are aligned in various directions with respect to each different domain. Therefore, the different domains compensate for one another such that a color shift is prevented in spite of wide viewing angles. To form the multi-domain, the present invention provides a plurality of dielectric protrusions.
    Type: Application
    Filed: July 19, 2004
    Publication date: December 23, 2004
    Inventors: Jang-Jin Yoo, Hyung-Ki Hong, Ki-Hyuk Yoon
  • Patent number: 6803979
    Abstract: The present invention discloses an IPS-LCD device. The IPS-LCD device according to the present invention implements a multi-domain for a liquid crystal layer. The liquid crystal molecules are aligned in various directions with respect to each different domain. Therefore, the different domains compensate for one another such that a color shift is prevented in spite of wide viewing angles. To form the multi-domain, the present invention provides a plurality of dielectric protrusions.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: October 12, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jang-Jin Yoo, Hyung-Ki Hong, Ki-Hyuk Yoon
  • Patent number: 6721025
    Abstract: A method for fabricating a liquid crystal cell and related device includes providing an alignment layer of a light sensitive material on a substrate; and exposing the alignment layer to unpolarized or partially polarized light, to provide pretilt for the molecules of the alignment layer.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: April 13, 2004
    Assignee: LG.Philips LCD Co., Ltd
    Inventors: Joung Won Woo, Kyeong Jin Kim, Soon Bum Kwon, Ki Hyuk Yoon, Young Seok Choi, Jong Hyun Kim, Jin Hee Jung
  • Publication number: 20040027522
    Abstract: A method is disclosed for controlling a pretilt angle direction for a liquid crystal cell comprising the steps of first setting the magnitude of pretilt angle and a plurality of pretilt angle directions in an alignment layer. This first step is achieved by irradiating linearly the alignment layer with polarized or unpolarized UV light. One of the plurality of pretilt angle directions is then selected by exposing the alignment layer to UV light a second time.
    Type: Application
    Filed: August 11, 2003
    Publication date: February 12, 2004
    Inventors: Yuriy Reznikov, Oleg Yaroshchuk, Joung Won Woo, Yoo Jin Choi, Ki Hyuk Yoon, Mi Sook Nam, Jong Hyun Kim, Soon Bum Kwon
  • Patent number: 6639720
    Abstract: A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The polarizer holder may be in a lattice structure holding a plurality of quartz substrate parts. A polarizer system employing the large scale polarizer comprises a lens making an incident light to a parallel light, the large scale polarizer, and a moving control part coupled to and moving the large scale polarizer.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: October 28, 2003
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae Beom Choi, Byung Duck Song, Ki Hyuk Yoon
  • Patent number: 6633355
    Abstract: A method is disclosed for controlling a pretilt angle direction for a liquid crystal cell comprising the steps of first setting the magnitude of pretilt angle and a plurality of pretilt angle directions in an alignment layer. This first step is achieved by irradiating linearly the alignment layer with polarized or unpolarized UV light. One of the plurality of pretilt angle directions is then selected by exposing the alignment layer to UV light a second time.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: October 14, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Yuriy Reznikov, Oleg Yaroshchuk, Joung Won Woo, Yoo Jin Choi, Ki Hyuk Yoon, Mi Sook Nam, Jong Hyun Kim, Soon Bum Kwon
  • Patent number: 6587173
    Abstract: The present invention relates to a multidomain liquid crystal display device that is capable of appropriately adjusting the angle of the boundary line of a slit formed on one substrate and the pitch of liquid crystal to thereby obtain multidomain for a main viewing angle on each of domains, thereby allowing a simplified manufacturing process and improving the viewing angle and transmissivity. The multidomain liquid crystal display device includes first and second substrates, the first substrate having a plurality of pixel areas, a transparent conductive layer on each pixel area of the first substrate and having at least one or more slits inclined at a prescribed angle with respect to a boundary of the pixel area, and a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: July 1, 2003
    Assignee: G. Philips LCD Co., Ltd.
    Inventors: Jang Jin Yoo, Ki Hyuk Yoon
  • Publication number: 20030117555
    Abstract: A method is disclosed for controlling a pretilt angle direction for a liquid crystal cell comprising the steps of first setting the magnitude of pretilt angle and a plurality of pretilt angle directions in an alignment layer. This first step is achieved by irradiating linearly the alignment layer with polarized or unpolarized UV light. One of the plurality of pretilt angle directions is then selected by exposing the alignment layer to UV light a second time.
    Type: Application
    Filed: July 22, 2002
    Publication date: June 26, 2003
    Inventors: Yuriy Reznikov, Oleg Yaroshchuk, Joung Won Woo, Yoo Jin Chol, Ki Hyuk Yoon, Mi Sook Nam, Jong Hyun Kim, Soon Bum Kwon
  • Patent number: 6515727
    Abstract: Disclosed is a color liquid crystal display device including an upper plate section having color filters, a lower plate section having a patterned electrode structure for each of red, green, and blue pixels, and a liquid crystal interposed between the upper and lower plate sections, wherein the pixels have different electrode widths and different slit widths for different colors, respectively. Respective pixel electrode widths (ER, EG, and EB) associated with the red, green, and blue colors have a relation of “ER≦EG≦EB”, and respective slit widths (SR, SG, and SB) associated with the red, green, and blue colors have a relation of “SB≦SG≦SR”.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: February 4, 2003
    Assignee: LG.Philips LCD., Ltd.
    Inventors: Ki Hyuk Yoon, Jang Jin Yoo
  • Publication number: 20030007116
    Abstract: A method is disclosed for controlling a pretilt angle direction for a liquid crystal cell comprising the steps of first setting the magnitude of pretilt angle and a plurality of pretilt angle directions in an alignment layer. This first step is achieved by irradiating linearly the alignment layer with polarized or unpolarized UV light. One of the plurality of pretilt angle directions is then selected by exposing the alignment layer to UV light a second time.
    Type: Application
    Filed: September 5, 2002
    Publication date: January 9, 2003
    Inventors: Yuriy Reznikov, Oleg Yaroshchuk, Joung Won Woo, Yoo Jin Choi, Ki Hyuk Yoon, Mi Sook Nam, Jong Hyun Kim, Soon Bum Kwon
  • Publication number: 20020176168
    Abstract: A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The polarizer holder may be in a lattice structure holding a plurality of quartz substrate parts. A polarizer system employing the large scale polarizer comprises a lens making an incident light to a parallel light, the large scale polarizer, and a moving control part coupled to and moving the large scale polarizer.
    Type: Application
    Filed: July 3, 2002
    Publication date: November 28, 2002
    Inventors: Jae Beom Choi, Byung Duck Song, Ki Hyuk Yoon
  • Publication number: 20020171795
    Abstract: A method for fabricating a liquid crystal cell and related device includes providing an alignment layer of a light sensitive material on a substrate; and exposing the alignment layer to unpolarized or partially polarized light, to provide pretilt for the molecules of the alignment layer.
    Type: Application
    Filed: June 17, 2002
    Publication date: November 21, 2002
    Inventors: Joung Won Woo, Kyeong Jin Kim, Soon Bum Kwon, Ki Hyuk Yoon, Young Seok Choi, Jong Hyun Kim, Jin Hee Jung
  • Patent number: 6469763
    Abstract: A liquid crystal cell having a first substrate with a rubbed layer provided thereon, a second substrate with a photo-aligned layer provided thereon, and a liquid crystal material provided between the substrates.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: October 22, 2002
    Assignee: LG Electronics Inc.
    Inventors: Jong Hyun Kim, Ki Hyuk Yoon, Joung Won Woo, Mi Sook Nam, Yoo Jin Choi, Kyeong Jin Kim
  • Publication number: 20020145799
    Abstract: A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The polarizer holder may be in a lattice structure holding a plurality of quartz substrate parts. A polarizer system employing the large scale polarizer comprises a lens making an incident light to a parallel light, the large scale polarizer, and a moving control part coupled to and moving the large scale polarizer.
    Type: Application
    Filed: May 30, 2002
    Publication date: October 10, 2002
    Inventors: Jae Beom Choi, Byung Duck Song, Ki Hyuk Yoon
  • Patent number: 6462797
    Abstract: A method for fabricating a liquid crystal cell and related device includes providing an alignment layer of a light sensitive material on a substrate; and exposing the alignment layer to unpolarized or partially polarized light, to provide pretilt for the molecules of the alignment layer.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: October 8, 2002
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Joung Won Woo, Kyeong Jin Kim, Soon Bum Kwon, Ki Hyuk Yoon, Young Seok Choi, Jong Hyun Kim, Jin Hee Jung
  • Publication number: 20020141059
    Abstract: A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The polarizer holder may be in a lattice structure holding a plurality of quartz substrate parts. A polarizer system employing the large scale polarizer comprises a lens making an incident light to a parallel light, the large scale polarizer, and a moving control part coupled to and moving the large scale polarizer.
    Type: Application
    Filed: May 30, 2002
    Publication date: October 3, 2002
    Inventors: Jae Beom Choi, Byung Duck Song, Ki Hyuk Yoon
  • Publication number: 20020130999
    Abstract: A LC cell is manufactured by the method including the steps of: rubbing a first alignment layer coating a first substrate, such that the first alignment layer has a first pretilt angle associated therewith; exposing said second alignment layer coating a first substrste to light such that said second alignment layer has at least one second pretilt angle associated therewith; and providing a liquid crystal material between said first and second substrates. The materials for the first and second alignment layers include a polyimide and a polysiloxane based material.
    Type: Application
    Filed: June 26, 2001
    Publication date: September 19, 2002
    Applicant: LG Electronics Inc.
    Inventors: Jong Hyun Kim, Ki Hyuk Yoon, Joung Won Woo, Mi Sook Nam, Yoo Jin Choi, Kyeong Jin Kim